It's never anything as simple as a "Change GameOver Screen", is it? Not sure why ASCII/Enterbrain overlooked that.

Anyway, in RM2k3 and RMXP, the best way is to use a single, 20x15 map, with an autostart event that will change the parallax background to whatever you want. Or, in simpler terms:

• When you die, "Call Common Event" instead of "Game Over" (set that in the Battle Layout tab)
• That Common Event will make your character transparent and hide the screen, then warp you to the Game Over map.
• The Game Over map will check to see what switches are active and will change the parallax background accordingly. Then it will reveal the screen and Wait for a few seconds.
• After the Wait period is over, it'll take you to the Title Screen.

In RM2k, though, you might be out of luck. I can't find a way to make it call an event when you die instead of going directly to the game over screen, unless you call that battle manually. (And off the top of my head, you can't put in a "Is everyone dead?" trigger directly in the battle, it'll just Game Over before the trigger activates)[/list]